Grinding or milling machine.



PATENTED JUNE 27, 1965,.

J. M. OLSSON. GRINDING 0R MILLING MACHINE.

APPLICATION FILED APB-.4.1903- WITNESSES Patented June 2 7, 1 905.

PATENT OFFICE.

J CNS MARTIN OLSSON, OF HQOR, SWEDEN.

GRINDING OR MILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 793,391, dated. June 27, 1905. Application filed April 4, 1903. Serial N0. 151,076.

To all whom it may concern/.-

Be it known that I, J ()Ns MARTIN OLSSON, a subject of the King of Sweden and Norway, residing at Hoor, in the Kingdom of Sweden, have invented certain new and useful Improvements in Grinding or Milling Machines, of which the following is a specification, reference being bad therein to the accompanying drawings, forming part thereof.

The object of this invention is to provide an improved grinding or milling machine or device which is designed to produce a round hole in the connecting-rod of the cross-head of a locomotive or any other metal work-piece or part of a machine, engine, or other appatus, a further object being to provide a machine of thisclass for enlarging round holes in the articles specified; and with these and other objects in view the invention consists in a machine of the class specified constructed as hereinafter described and claimed.

The invention is fully disclosed in the f ollowing specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which- Figure 1 is a sectional side view of my improved grinding or milling machine; Fig. 2, an end view thereof looking in the direction of the arrow 00,- Fig. 3, a plan view thereof, part of the construction being broken away; Fig. 4, a bottom plan view of a disk-cap which I employ; Fig. 5, a top plan view of a disk on which the disk-cap shown in Fig. 4 is used and showing other parts connected with said disk; Fig. 6, a plan view showing a modification of the construction shown in Fig. 5, and Fig. 7 a section on the line 7 7 of Fig. 5.

The frame of the machine and several other parts may be of any suitable arrangement and are therefore not shown in the drawings.

Of the reference-numerals, 1 denotes the shaft of the grinding or milling tool 2.

3 denotes the movable work-table, 4 the main stationary machine-table,and 5 the crankpin. The crank-pin is fixed to a slide 6, which is movable radially on a disk 7, supporting the pin 5, and said disk 7 is provided with a cap 7, having a diametric slot or groove 7 in the bottom thereof and an oblong slot 7 in the top portion thereof, which communicates with the slot or groove 7 b in the bottom thereof, and when the cap 7 is secured to the disk 7 the slide 6 moves in the slot or groove 7 in the bottom of said cap. The disk 7 is provided with a shaft 8, journaled in the main table 4 coaxially with the tool-shaft 1 and provided with a crank. or other operating device 9, so that it can be rotated. The adjusting of the slide 6 and therewith the crank-pin 5 is effected by means of the screw 10, mounted in the disk 7 and in connection with the said slide. The movable table 3 is supported ata suitable distance from the pin 5 by means of a pin 11, connected with a slide 12, movable in a support 12, mounted on the main stationary table 4, so that the said table 3 can participate in the movement of the pin 5 and the movements of said pin and table be made exact. In order that the pin 5, which enters a socket in the table 3, may not be subjected to end pressure by the table 3, the latter is supported by suitable devices 13, connected with the table 4.

The method of operation is as follows: When a socket-that is, the socket in the connecting rod or link of a cross-head of a locomotiveis to be ground, the pin 5 is set exactly in the center of the disk 7, so that the work-table even during the rotation of the disk 7 remains stationary, after which the work-piece 14 is firmly secured to the table 3 by means of bolts and screws 14 or the like connected with the table 3 for such purpose, so that the hole to be ground comes right under the tool 2, as shown at 2 The tool 2 may be of any desired form and construction and has partly a rotary and partly an up-and-down axial movement, the latter being so adjusted that the tool passes through the entire thickness of the work-piece. The pin 5 is moved by means of the screw 10 from its central position in the disk 7 until the tool 2 comes in contact with the inside of the socket, after which the disk 7 is set in slow rotation. The work-piece is now moved in consequence of the oscillating movement of the table 3 in such manner in relation to the tool that the inside of the hole or hollow along its circumference said movement of the work-table and the workpiece similar to the movement of a crank-rod or eccentric-rod are easily to be found, the principle being that the work-piece is brought into an oscillating or rotating movement round the rotary grinding or milling tool as necessitated by the shape and size of the aperture to be made in said work-piece.

The principal feature of this device is found in the movement or motion of the work-table 3 and the work-piece 14, one end of said parts moving in a circle and the other end moving backward and forward. The grinding-tool produces a round hole in the work-piece by reason of the fact that the tool 2 is arranged coaxially with the shaft 8.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine of the class described, a stationary table, a rotary milling-tool arranged vertically thereover, a Work-table arranged on the stationary table and having a freelyslidable longitudinal movement thereon and about a pivotal axis, said work-table being adapted to carry a work-piece, and means for giving the end of the work-table and the workpiece beneath the tool a circular motion, substantially as described.

2. In a machine of the class described, a

stationary table, a work-table pivoted to a support slidably mounted on the stationary table, a disk mounted between the stationary table and the work-table and provided with a shaft journaled in the stationary table, a crankpin connected with said disk and adjustable radially thereof and adapted to engage the work-table and means for turning said disk, substantially as shown and described.

3. In a machine of the class described, a stationary table, a support connected with one end thereof, a slide mounted in said support, a work-table pivotally connected with said slide, a crank-disk mounted between the stationary table and the free end of the worktable, a crank-pin adjustable radially of said disk and adapted to enter a socket in the worktable, and means for turning said disk, substantially as shown and described.

4. In a machine of the class described, a stationary table, a support connected with one end thereof, a slide mounted in said support, a work-table pivotally connected with said slide, a crank-disk mounted between the'stationary table and the free end of the Worktable, a crank-pin adjustable radially of said disk and adapted to work in a socket in the work-table, and a vertically movable and rotatable tool mounted over said work-piece and centrally over said crank-disk, substantially as shown and described.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

J ONS MARTIN OLSSON. Witnesses:

H. ANDERssoN, HILDING HEssLEY. 

